高压输电线铁塔地震时程弹性数值模拟

地震对高压输电线铁塔的安全性能有重要影响。通过建立高压输电线铁塔模型，采用有限元方法对受7级和8级地震影响的高压输电线铁塔的力学行为进行数值模拟与分析。计算结果表明:在地震作用下高压输电线铁塔t=3-4s时加速度最大，其应力也相应较大；在7级地震时最大应力值远小于材料的许可应力，高压输电线铁塔在7级地震过程中是安全的，但是8级地震时，最大应力值已经达到234MPa，超过Q345许可应力230MPa，高压线铁塔就处于不安全运行状态。

Numerical simulation on seismic time history elastane of high voltage transmission tower

The safety performance of high voltage transmission tower can be affected obviously by earthquake. With finite element method, the model of high voltage transmission tower was established to study its strength and safety, which was affected by 7 magnitude earthquake and 8 magnitude earthquake. The numerical simulation results showed that the acceleration of high voltage transmission tower is biggest at 3s 4s with earthquake, and at the same time the stress of tower is larger, with 8 magnitude earthquake the maximum stress value is much smaller than the material allowable stress, high voltage transmission tower is safe. But with 7 magnitude earthquake the maximum stress value 234MPa is bigger than the allowable stress 230MPa of Q345, which may cause the high voltage transmission tower in the state of unsafe operation.